Designed for rugged reliability, the Sand Viper easily converts from glasses to goggles and back, allowing you to quickly adapt to virtually any environment. The frame features closed-cell memory foam technology that is sculpted around the interior for protection and comfort, while utilizing a perforated molding to provide a regulated air entry during rigorous activity. The polycarbonate lenses provide 99.9% UV protection and have been treated with an anti-fog/abrasion resistant coating. CSA Z94.3 certified and meets ANSI Z87.1.